The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9841994 B1

Date of Patent:

Dec. 12, 2017

Filed:

Apr. 27, 2015

Implementation of multi-tasking on a digital signal processor with a hardware stack

Applicant:

Nxp B.v., Eindhoven, NL;

Inventor:

Tomas Henriksson, Eindhoven, NL;

Assignee:

NXP B.V., Eindhoven, NL;

Attorney:

Primary Examiner:

George Giroux

Int. Cl.

CPC ...

G06F 15/00 (2006.01); G06F 7/38 (2006.01); G06F 9/00 (2006.01); G06F 9/44 (2006.01); G06F 9/48 (2006.01); G06F 9/38 (2006.01); G06F 9/30 (2006.01); G06F 15/82 (2006.01);

U.S. Cl.

CPC ...

G06F 9/4856 (2013.01); G06F 9/30058 (2013.01); G06F 9/3851 (2013.01); G06F 9/4426 (2013.01); G06F 9/4843 (2013.01); G06F 15/82 (2013.01);

Abstract

The present invention relates to the implementation for implementing multi-tasking on a digital signal processor. For that purpose blocking functions are arranged such that they do not make use of a processor's hardware stack. Respective function calls are replaced with a piece of inline assembly code, which instead performs a branch to the correct routine for carrying out said function. If a blocking condition of the blocking function is encountered, a task switch can be done to resume another task. While the hardware stack is not used when a task switch might have to occur, mixed-up contents of the hardware stack among function calls performed by different tasks are avoided.

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